Picture frame



FIG. 1 is a perspective view of the picture frame;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an unfolded layout view thereof with broken lines illustrating fold lines for forming the frame monolithically with a supporting part and a fixing part. 

CLAIM The ornamental design for a picture frame, as shown and described. 